α-Arylation of alkylamines with sulfonylarenes through a radical chain mechanism
作者:Yuko Ikeda、Ryota Ueno、Yuto Akai、Eiji Shirakawa
DOI:10.1039/c8cc03604g
日期:——
In the presence of a substoichiometric amount of a tert-butoxy radical precursor, the reaction of alkylamines with sulfonylarenes was found to give α-arylated alkylamines through homolyticaromaticsubstitution, where a radical chain is operative.
α-Aminoalkylation of sulfonylarenes with alkylamines was found to proceed successfully in the presence of a base in MeOH under photoirradiation, giving a wide variety of α-arylalkylamines. The reaction is initiated by photolysis of the S−Ar bond of sulfonylarenes leading to generation of α-aminoalkyl radicals, which get into a radical chain to give α-arylalkylamines.
A new dominoreactionsequence has been realized between chelating heteroaryl methanamine and cheap and simple Mn(II) salt, leading to 2,3,4,5-tetrasubstituted pyrrole coordinated dinuclear Mn(II) complex. The reaction process has been studied and a six-step dominosequence involving the convergent [3+2] cycloaddition between imine and alkene/alkyne which were formed divergently from starting amine